Adjustable drill mount



Dec. 1, 1964 N. A. WALKER ETAL:

ADJUSTABLE DRILL. MOUNT 3 Sheets-Sheet 1 Filed March 15, 1962 INVENTORS NELSON WAL/ff? R/CHARD I: CARE) A T TOPN Dec.

Filed March 15, 1962 A. WALKER ETAL ADJUSTABLE DRILL uoum 1 I 1 3 Sheets-Sheet 2 NELSON WALKER RICHARD f. CAREY AT TOR/VEV Dec. 1, 19.64 N. A. WALKER ETAL 3,159,061 ADJUSTABLE DRILL mourn Filed March 15, 1962 s Sheet s-Sheet s //4r// W" FIG 7 INVENTbRS NELSON WALKER RICHARD E CAREY Man! ATTORNEYS United States Patent I 3,159,061 ADJUSTAIBLE DRILL MOUNT Nelson A. Walker, San Jose, and Richard F. Carey, Saratoga, (Zalif, assignors to Buck Manufacturing (10., San Jose, Calif, a corporation of Delaware Filed Mar. 15, 1962, Ser. No. 179,861 8 Claims. (6]. 77-59) This invention relates to improved adjustable positioners for use on portable electric drills and the like equipped with work gripping bases.

An object of this invention is to provide an improved positioner for use on electric drills and the like equipped with electromagnetic bases so that the upper portion of the electric drill structure may be adjusted with respect to the electromagnetic base structure.

Another object of this invention is to provide an improved adjustable positioner which is adapted for use on electric drills that are provided with work-gripping bases, said positioner being provided with a manually operable screw member for engaging one or more movable or yieldable members for pressing these members into locking engagement with an opposing member for clamping the base structure of the electric drill to th work-gripping base.

Still another object of this invention is to provide an improved adjustable positioner to tools such as electric drills and the like that are provided with work-gripping bases, said positioner being provided with a rod-shaped member that is positioned in the base of the tool and is provided with a manually operable screw member which is adapted to press movable or yieldable members into a clamping member for actuating said clamp ing member into clamping position.

Other and further objects of this invention will be apparent to those skilled in the art to which it relates, from the following specification, claims and drawing.

In accordance wiht this invention, there is provided an adjustable positioner for tools such as electric drills and the like whereby the position of the cutting element of the tool may be changed with respect to the work surface to anyone of a plurality of different positions after the work surface gripping base of the tool is fixed in position.

In this positioner the bottom of the frame structure of the electric drill is provided with a member which has a surface that is adapted to engage the upper surface of the electromagnetic base structure. A clamping member is provided extending from the top of the electromagnetic base and into the lower part of the drill frame structure. This clamping member is provided with a cavity into which a rod-shaped member is inserted, and this rod-shaped member is provided with a threaded member that extends out to one side of the base Whereby the clamping member may be actuated from the outside of the base from a fixed position by actuating the threaded member. One end of the cavity in this rod-shaped member terminates in the clamping member and this portion of the cavity is provided with either a pair of steel balls, one of which may be pressed against a surface of the clamping member, or it is provided with suitable deformable material which may also be pressed against the surface of the clamping member.

Both the steel balls and the deformable material may be pressed into this engaging position by manipulating the threaded member from a fixed position on the outside of the electromagnetic base. Thus the clamping member may be released from clamping engagement and the electric drill frame may be moved with respect to the top of the electromagnetic base into the desired position. Thereafter the clamping member may be tightened so as to provide rigid support for the electric drill frame on the electromagnetic base.

Further details of this invention will be set forth in the following specification, claims and drawing in which, briefly:

FIG. 1 is a fragmentary side view of an embodiment of this invention showing the work-gripping base in section;

FIG. 2 is a sectional view taken along the line 22 of FIG. 1;

FIG. 3 is a sectional view taken along the line 33 of FIG. 2 showing the clamping member in tightened position;

FIG. 4 is a sectional view similar to FIG. 3 showing the clamping member in loose position;

FIG. 5 is a sectional view taken along the line 55 of FIG. 1;

FIG. 6 is a sectional view taken along the line 6-6 of FIG. 5;

FIG. 7 is a modified form of the clamping member actuating mechanism; and

FIG. 8 is another modified form of the clampingmember actuating mechanism. 7

Referring to FIG. 1 of the drawing in detail, there is illustrated the bottom portion of the electric drill frame structure" aniltelectromagne'ticbase constructed in accordance with this invention, the upper portion of the electric drill frame structure being cut away and the electromagnetic base being shown in cross-section. Reference numeral 10 designates the electromagnetic base; reference numeral 11 designates the electric drill frame structure, and reference numeral 12 designates the electric drill which is slidably attached to the frame structure 11. The base 16 is provided with an annular cavity 13 in which the electrical coil 14 which comprises a plurality of turns of wire insulated from each other is supported by means of the bobbin or spool 15. A circular plate 16 is attached to the top of the base 10 by means of suitable screws such as the screw 18 and this plate forms a part of the base structure. Another substantially circular plate 17 is attached to the foot 19 of the electric drill frame structure by means of screws 20. These plates 16 and 17 have the opposing surfaces thereof in engagement and when it is desired to adjust the electric drill frame structure so that the bit 21 of the electric drill may be positioned over a desired point or mark on a work surface the bottom surface of plate 17 may be slidably moved in any desired direction with respect to the top surface of plate 16 to accomplish this result even though the electromagnetic base is energized and grips the work firmly.

The base 10 has an additional cavity 22 provided thereto in which the lower portion of the clamping member 23 is positioned. A hole 24 is formed through the clamping member 23 and this hole is adapted to be aligned with the hole 25 of the base structure 10. However, hole 24 is of somewhat larger diameter than hole 25. These holes are adapted to receive the rod-shaped member 26 which is positioned in these holes so that the ball 27 that is positioned in the cavity 28 thereof may be brought into engagement with the lower surface 24a of the hole 24 of the clamping member. Hole 2812 is of a diameter slightly greater than the diameter of the ball 29 and the diameter of the rod 30. The inner end of this hole 28b is provided with a shoulder 28a which prevents the smaller ball 27 from being pressed completely into' the smaller hole 28 that extends outwardly toward one side of the rod-shaped member 26 as shown in FIGS. 3 and 4. In other words, this shoulder 28a limits the inward movement of the ball 27.

The bolt 31 is threaded into the end portion of the hole 28b formed in the rod 2 6, and the outer end of this bolt 31 is provided with a handle 32. A pin 26a is provided in the base 16 and this pin extends into the rod 26 to hold this rod fixed and prevent it from turning in the hole 25. The bolt 31 may be rotated by manually manipulating the handle 32 which is positioned on the outside of the electromagnetic base 19. Thus the bolt 31 forces the rod against the ball 29 which in turn presses against the ball 27 and forces this latter ball against the surface 24a of the hole 24 of the clamping member 23.

The upper end of the clamping member 23 is provided with a nut 34 that is threaded thereto, and below this nut 34 there is positioned a large washer 35 which is adapted to engage surfaces on the upper side of the plate member 17 adjacent to the slot 36 provided in this plate member. Thus pressing the ball 27 against the surface 24aof the hole 24 in the clamping member 23, tightens the nut 34 down on the washer 35 and the large washer 35 is clamped against the upper surface of the plate 17. The bottom surface of this plate is thus held firmly against the upper surface of the base plate 16 so that the drill frame structure is clamped down on the electromagnetic base structure after the drill bit of the electric drill is located over the desired point of the work surface.

Suitable holes and grooves are provided in the clamping member 23 and base 10 through which the insulated electrical conductors 40 pass as described in application S.N. 695,178 filed Nov. 7, 1957 by Eugene W. Buck and assigned to a common assignee. These electrical conductors are used for supplying an electric current to the winding 14.

A suitable stop 41 is provided to the base plate 16 as shown in FIGS. 5 and 6 and this stop cooperates with the stop 17a formed on the plate 17 to prevent a full 360 degree rotation of the drill frame structure, to which the plate 17 is attached, with respect to the base structure. Thus these stops prevent excessive rotation of the drill frame structure in one direction and it is therefore not possible to twist off the electric cable 40 passing through the member 23.

In FIG. 7 there is shown a modification in which three balls 42, 43 and 44 are employed in the rod member 26 instead of the two balls 27 and 29 shown in FIGS. 3 and 4. The operation of this modification is similar to the operation of the form shown in FIGS. 3 and 4 in that the bolt 31 presses the rod 30 against one of the balls 42 which is pressed against the smaller balls 43 and 44. ball 43 is confined by the member 45 which is threaded into the rod 26 and ball 44 is forced out of the rod 26 into engagement with the clamping member 23.

Another modification is shown in FIG. 8 in which the rod 26 is provided with a deformable and resilient member 46 of rubber, plastic or the like and the close fitting steel plunger 47 in place of the balls 27, 29, 42, 43 and 44 shown in FIGS. 3, 4 and 7. The threaded member 31 is used to press the closely fitting plug 30 against the deformable member 46 which in turn presses the bottom of the closely fitting plunger 47 against the clamping member surface 24a. If desired the bottom surface of the plunger 47 may be made arcuate to conform to the are of the hole 24 so that a larger area of surface 24a is engaged by the member 46'than is engaged by the balls 27 and 44.

While we have shown a preferred embodiment of the invention, it will be understood that the invention is capable of variation and modification from the form shown so that its scope should be limited only by the scope of the claims appended hereto;

What We claim is:

1. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame.

structure, said base structure having an upper surface engaged with said bottom surface, a clamping member extending from said base structure into said frame struc- Cit ture through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the portion of said clamping member located in said base structure, another hole formed in said base structure substantially in alignment with said hole in said clamping member, a rod positioned in said holes, means for fixing said rod in said holes to prevent turning thereof with respect thereto, said rod having a bore extending therethrough from one end thereof to the hole in said clamping member and means movable into said bore for actuating said clamping member to clamp said surfaces together against shifting movement.

2. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member extending from said base structure into said frame structure through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the portion of said clamping member located in said base structure, another hole formed in said base structure from the side thereof substantially in alignment with said hole in said clamping member, a rod positioned in said holes, one end of said rod extending out of said base structure, said rod having a bore extending therethrough from the outside end thereof to the hole in said clamping member and means movable into said bore for actuating said clamping member to clamp said surfaces together against shifting movement.

3. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member extending from said base structure into said frame structure through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the portion of said clamping member located in said base structure, another hole formed in said base structure substantially in alignment with said hole in said clamping member, a rod positioned in said holes, said rod extending out of said base structure, said rod having a bore extending therethrough from the outside end thereof to the hole in said clamping member, means movable into said bore for operating said clamping member, said movable means comprising a threaded member in said bore operable from the outside of said base structure for pressing said movable means against said clamping member to clamp said surfaces together against shifting movement.

4. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member evtending from said base structure into said frame structure through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the portion of said clamping member located in said base structure, another hole formed in said base structure substantially in alignment with said hole in said clamping member, a rod positioned in said holes, said rod extending out of the side of said base structure, said rod having a bore extending therethrough from the outside end thereof to the hole in said clamping member, ball shaped means in said bore for engaging said clamping member and means in said bore operable from the outside of said base structure for pressing said ball shaped means against said clamping member to clamp said surfaces together against shifting movement.

5. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member for holding said base structure and said frame structure together, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough, another hole formed in one of said structures substantially in alignment with said hole in said clamping member, a rod positioned in said holes, said rod having one end exposed, said rod having a bore extending therethrough from the exposed end thereof to the hole in said clamping member, ball-shaped means in said bore for engaging said clamping member and means in said bore operable from the outside end of said rod for pressing said ballshaped means against said clamping member to clamp said surfaces together against shifting movement.

6. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member extending from said base structure into said frame structure through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough, another hole formed in one of said structures substantially in alignment with said hole in said clamping member, a rod positioned in said holes, said rod having one end exposed, said rod having a bore extending therethrough from the exposed end thereof to the hole in said clamping member, ballshaped means in said bore for engaging said clamping member and means in said bore operable from the outside end of said rod for pressing said ball-shaped means against said clamping member to clamp said surfaces together against shifting movement.

7. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member for holding said base structure and said frame structure together, a part of said clamping member being positioned in a cavity in said base structure, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the part of said clamping member located in said base structure, another hole formed in said base structure substantially in alignment with said hole in said clamping member, a rod positioned in said holes, said rod extending out of the side of said base structure, said rod having a bore extending therethrough from the outside end thereof to the hole in said clamping member, deformable means in said bore, a substantially non-deformable member in said bore for engaging said clamping member and means in said bore operable from the outside of said base structure for pressing on said deformable means and for forcing said non-deformable member against said clamping member to clamp said surfaces together against shifting movement.

8. In a drill mount or the like, a frame structure having a bottom surface, a base structure for said frame structure, said base structure having an upper surface engaged with said bottom surface, a clamping member extending from said base structure into said frame structure through openings formed in said surfaces, said clamping member permitting relative shifting movement between said surfaces, said clamping member having a transverse hole formed therethrough in the portion of said clamping member located in said base structure, another hole formed in said base structure substantially in alignment with said hole in said clamping member, a rod positioned in said holes, means for holding said rod fixed in said hole in said base structure to prevent said rod from turning therein, said rod extending out of the side of said base structure, said rod having a bore extending therethrough from the outside end thereof to the hole in said clamping member, deformable means in said bore, a'substantially non-deformable member in said bore for engaging said clamping member in said transverse hole and means in said bore operable from the outside of said base structure for pressing on said deformable means and for forcing said non-deformable member against said clamping member to clamp said surfaces together against shifting movement.

References Cited in the file of this patent UNITED STATES PATENTS 

1. IN A DRILL MOUNT OR THE LIKE, A FRAME STRUCTURE HAVING A BOTTOM SURFACE, A BASE STRUCTURE FOR SAID FRAME STRUCTURE, SAID BASE STRUCTURE HAVING AN UPPER SURFACE ENGAGED WITH SAID BOTTOM SURFACE, A CLAMPING MEMBER EXTENDING FROM SAID BASE STRUCTURE INTO SAID FRAME STRUCTURE THROUGH OPENINGS FORMED IN SAID SURFACES, SAID CLAMPING MEMBER PERMITTING RELATIVE SHIFTING MOVEMENT BETWEEN SAID SURFACES, SAID CLAMPING MEMBER HAVING A TRANSVERSE HOLE FORMED THERETHROUGH IN THE PORTION OF SAID CLAMPING MEMBER LOCATED IN SAID BASE STRUCTURE, ANOTHER HOLE FORMED IN SAID BASE STRUCTURE SUBSTANTIALLY IN ALIGNMENT WITH SAID HOLE IN SAID CLAMPING MEMBER, A ROD POSITIONED IN SAID HOLES, MEANS FOR FIXING SAID ROD IN SAID HOLES TO PREVENT TURNING THEREOF WITH RESPECT THERETO, SAID ROD HAVING A BORE EXTENDING THERETHROUGH FROM ONE END THEREOF TO THE HOLE IN SAID CLAMPING MEMBER AND MEANS MOVABLE INTO SAID BORE FOR ACTUATING SAID CLAMPING MEMBER TO CLAMP SAID SURFACES TOGETHER AGAINST SHIFTING MOVEMENT. 